Black clouds in Texture Paint
I see 2 problems. I believe you are following Blender Guru's doughnut tutorial. That was the first one I followed as well.

Make sure to use a &quot;Texture Mask&quot;

In the drop-down titled &quot;Brush&quot;, choose &quot;Brush Mask - Texture&quot;


After these adjustments your brush should match Blender Guru's brush.
EDIT:
Here is a screenshot of most of my screen: